You can give the operator characters names appropriate to their functionality, like "ANDrea" or "OReo". Ask students what different characters would do in various situations. More about this tip Tags Intro Programming Programming Concepts External Source From WOOLLARD, WILLIAM JOHN (2004), “The rôle of metaphor in the teaching of computing; towards a taxonomy of pedagogic content knowledge.”, University of Southhampton, School of Education, PhD Thesis, pg 121 Other Tips By Other Tips By William John Woollard